Compressor



p 1929. F. 0. H0LDsw0R'm 1,707,307

I COMPRESSOR Filed July 5, 1924 M x 5Q 22 25 I:III-I'lllllllllllqlllllllmlllil/ Patented Apr. 2, 1929.

1,707,307v PATENT OFFICE.

FRED D. HOLDSWORTH, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVANIACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

COMPRESSOR.

Application flled-Iu1y 5, 1924. Serial No. 724,492.

My invention relates to compressors and particularly to coolingarrangements for use in connection with compressors.

An object of my invention is to provide an improved compressormechanism. Another object of my invention is to provide an improvedcompressor comprising an improved cooling system. A further object of myin vention is to provide an improved heat exchange device. Other objectsand advanta es of my invention will hereafter more fully ap ear. 1

n the accompanying drawings I have shown for purposes of illustrationone form which my invention may assume in practice.

In these drawings,-

Fig. 1 is a side elevation with parts broken away of a compressor inwhich my improved cooling system is employed. f

Fig. 2 is a horizontal section on a plane corresponding to the sectionline 2-2 of Fig. 1.

It is now generally understood that the maximum cooling efiicienc isobtainable in heat exchange devices by t e em loyment of thecountercurrent principle; an in my present invention I have providednovel means for. securing the benefits of this principle in a compressorsystem.

As illustrative of my invention, I have.

shown the same embodied in a compressor gpnerally designated 1 andcomprising a ame 2 which supports the jacketed low pressure cylinder 3and jacketed high pressure cylinder 4, these being arranged at an angleof 90 to each other so that an angle compound compressor is produced,Usual pistons in the cylinders are actuated from the usual crank shaftC. Supported upon the frame upon a supporting surface 5 is theintercooler 6, this being arranged in the air line between the lowpressure cylinder 3 and the high pressure cylinder 4. This intercooler,which is of the countercurrent flow type, comprises a vertical, generallrectangular casing 11 at whose opposite si es longitudinally extendingpassageways 12 and 13 are provided bythe cooperation of semi-circularwalls 14 and 15 with portions of the outer walls of the casing t theopposite ends of the casing 11 there areprovided tube sheets 16 and 17,the tube sheet 16 being arranged at the lower end of the casing andcomprising a passageway 18 communicating.

with the passageway 12 and a plurality of openings 19 in which the lowerends of a numthen flows out through a connection 32 at the her of tubes20 are secured. The upper tube sheet 17 has an opening 21 therethroughcommunicating with the passageway 13 and has a series of openings 22 inwhich the'upper ends of the tubes 20 are secured. Outside the tube sheet17 is a cover 23 which serves to provide a conducting chamber for theair from the passageway 13 to the upper ends of the tubes 20. Below thelower tube sheet 16 is a hollow pedestal member 24 which serves as aconduit for the air discharged through tubes 20; that is, the member 24receives the air from the tubes 20 and delivers it to the port 18 fortransmission through the passage 12. The low pressure cylinder dischargechamber is connected by a pipe 25 with an opening 26 through a boss 27on the side of the casing 6. As shown in this embodiment, the pipe 25and opening 26 serve to conduct the air into the lower end of thepassage 13; while a pipe 28 connects the upper end of the passage 12with the hi h pressure cylinder intake space. It is desire to point outat this time that the arrangement described, in so far as some of itsdetails are concerned, is for purposes of convenience, a ver smallpercentage of the cooling efliciency being sacrificed in order that amore rugged and compact structure may be produced. It will be obviousthat the passage 25 might communicate directly with the space within thehead 23, the passage 13 being wholly omitted; and also that the pipe 28might communicate with the space withln the pedestal 24, therebyeliminating the passage 12. A small improvement in efiiciency wouldresult, but at the cost of a considerable loss in ruggedness ofconstruction. 1 The cooling fluid system employed herein includes awater inlet connection 29 to the lower side of the low pressure cylinderjacket and a connection 30 leading out from the upper side of the lowpressure cylinder jacket to the bottom of the interior space of thecasing 6, the inlet to this casing being shown at 31. The water i IIextreme to of the casing 6 byway of a pipe 33 to the ottom of the jacketof the hlgl'l pressure cylinder and is finally conducted away through aipe 34 which connects to the top of the big pressure cylinder jacket. Itwill therefore be apparent that there is no possible chance for thisstructure to become air bound and no possible opportunit of a loss ofcooling efiioiency due to that di culty. The cooling water must firstcompletely fill all the space within the low pressure cylinder jacket,must then completely fill all the space within the casing 6 andsurrounding the tubes 20, and must then fill all the space within thehigh pressure cylinder jacket before it can escape. It will be obviousthat in case of leakage of air into the water space of the intercoolerthe air will at once rise to the top and pass over through the pipe 33,being carried along with the water therein, and then pass up to the topof the high pressure cylinder jacket from which it can readily escapethrough the top outlet 34. An opening controlled by a suitable pet cock,not shown,.

is provided in the base of the member 24 for drainage purposes.

From what has been pointed out already, it will be readily apparent'howthis device operates. The water circulation has been described; and itwill have been observed that the flow. of the cooling liquid is from thebottom to the top of the intercooler. It will be noted that the air flowis from the top to ing the time the air is within these passages and themajor cooling effect is secured during the counterflow of the air in themany small tubes 20. It will of course be understood that in practicethe cooling liquid will be supplied in such volume that there will be'no return of heat to the air in the passage 12 even at the upperportion of this passage.

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration and that theinvention may be modified and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In combination, in a compressor, a low pressure cylinder, a cylinderreceiving compressed fluid from said low pressure cylinder andcooperating in the further compression thereof, a crank shaft, the axesof said cylinders making an angle with each other whose apex lies insaid crank shaft, an intercooler intermediate said cylinders, saidcylinders and intercoolerall lying to one side of a plane passingthrough said crank shaft, means for supplying a liquid to the bottom ofsaid intercooler and discharging the same at the top, and means forconducting fluid from said first to said second cylinder causing thesame to flow from the top to the bottom of said intercooler including aplurality of means providing paths for said fluid through theintercooler.

2. In combination, in a compressor, a low pressure cylinder, a cylinderreceiving compressed fluid from said low pressure cylinder andcooperating in the further compression thereof, a crank shaft, the axesof said cylinders making angles with the opposite sides of a planeincluding the axis of said crank shaft, an intercooler intermediate saidcylinders, said cylinders and intercooler all lying to one side ofanother plane including said crank shaft, means for supplying a liquidto the bottom of said intercooler and discharging the same at the top,and means for conducting fluid from said first to said second cylindercausing the same to flow from the top to the bottom of said intercoolerincluding a plurality of means providing paths for said fluid throughthe intercooler.

3. In combination, in a compressor, a jacketed low pressure cylinder, :1jacketed cylinder receiving compressed fluid from said low pressurecylinder and cooperating in the further compression thereof, a crankshaft, an intercooler intermediate said cylinders, said cylinders andintercooler all lying to one side of a plane passing through said crankshaft, means for supplying liquid to the bottom of the intercooler anddischarging the same at the top, means for supplying cooling liquid tothe bottoms of the jackets of said cylinders and discharging it fromsaid tops, and means for conducting fluid from said first to said secondcylinder to cause it to flow from the top to the bottom of theintercooler including means for providing plural paths for the fluidthrough the intercooler.

4. In combination, in a compressor, a jacketed low pressure cylinder, ajacketed cylinder receiving com ressed fluid from said low pressurecylin er and cooperating in the further compression thereof, anintercooler intermediate said cylinders, means for supplying coolingliquid to the bottom of one of said cylinders, means for conducting saidliquid from the top of said cylinder to the bottom of said intercooler,means for conducting said liquid from the top of said intercooler to thebottom of the other of said cylinders, and means for discharging saidliquid from the top of said last mentioned cylinder. Y 1

5. In combination, in a compressor, a jacketed low pressure cylinder, ajacketed cylinder receiving compressed fluid from said low pressurecylinder and cooperating in the further compression thereof, anintercooler intermediate said cylinders, means for supplying coolingliquid to the bottom of one of said cylinders, means for conducting saidtill fluid from the top of said cylinder to the bottom of saidintercooler, means for conducting said liquid from the top of saidintercooler to the bottom of the other of said cylinders, means fordischarging said liquid. from the top of said last mentioned cylinder,and means for conducting fluid from the first mentioned cylinder to thesecond mentioned cylinder through said intercooler and causing the fluidto flow through said intercooler in a downward direction and in aplurality of paths.

6. In combination, in a compressor, a acketed low pressure cylinder, ajacketed cylinder receiving compressed fluid from said low pressurecylinder and cooperating in the further compression thereof, anintercooler intermediate said c linders, means for supplying coolin liui to the bottom of said first mentione cy inder, means for conductingsaid liquid from the top of said cylinder to the bottom of saidintercooler, means for conducting said liquid from the top of saidintercooler to the bot-tom of the other of said cylinders, means fordischarging said liquid from the top of said last mentioned cylinder,and means for conducting fluid from the first mentioned cylinder to thesecond mentioned cylinder through said intercooler and causing t e fluidto flow through said intercooler in a dlqwnward direction and in aplurality of pat s.

7. In combination, in a compressor, a jacketed cylinder disposed withits axis vertical, a heat exchange device vertically disposed adj acentthereto, means for supplying a cooling liquid to the bottom of said heatexchange device and conducting the same from the top thereof to thebottom of said 0 linder, and means for sup lying fluid to sai cylinderto be compresse therein through said intercooler comprising a pluralityof passages extending longitudinally of said intercooler through whichsaid fluid flows downwardly on its way to said cylinder.

8. In combination, in a compressor, a low pressure cylinder, :1 cylinderreceiving compressed fluid therefrom and coo crating in the furthercompression of said uid. an intercooler comprising a tank affording acooling liquid chamber, means within said chamber constituting a pluralpath conducting means for compressed fluid, means for supplylng acooling liquid to the bottom of the chamber and discharging the same atthe top, and means for conducting the fluid from the first mentionedcylinder to the top of the conducting means and leading it from thebottom of the latter to the second mentioned cylinder.

9. In combination, in a compressor, a low pressure cylinder having acooling fluid jackct. a cylinder receiving compressed fluid from saidiow pressure cylinder and cooperating in the further compression of saidfluid, said second mentioned cylinder having a cooling jacket, anintercooler comprising a cooling liquid receptacle and conducting meanstherein for fluid being compressed comprising a plurality ofparalleltubes, connections between said conducting means and said firstand second mentioned cylinders, and means for'conducting a coolingliquid comprising an inlet for said fluid to the jacket of the lowpressure cylinder, means connecting said jacket to the bottom of theintercooler receptacle, and means connecting the top of the intercoolerreceptacle to the jacket of said second mentioned cylinder.

10. In combination, in a compressor, a low pressure cylinder, a jacketedcylinder receiv- 1n compressed fluid from said low pressure cy inder andcooperating in the further compression thereof, a crank shaft, the axesof said cylinders makin an angle with each other whose apex lies in saidcrank shaft and the axis of said second mentioned cylinder saidcylinders, said cylinders and intercooler all lying to one side of aplane passing through said crank shaft, means for supplying a liquid tothe bottom of said intercooler and conducting the same directly from thetop thereof to the bottom of the jacket of said vertically disposedcylinder, and means for conducting fluid by way of said intercooler fromsaidifirst to said second cylinder causing the same to flow from the topto the bottom of said intercooler, including a plurality of meansproviding paths for said fluid through the intercooler.

11. In combination, in a compressor, a jacketed cylinder dis osed withits axis horizontal, a jacketed cy inder disposed with its axis verticaland receiving compressed fluid from said horizontally disposed cylinderand cooperating in the further compression there of, a crank shaft, theaxes of said cylinders making an angle with each other whose apex liesin said crank shaft, a heat exchange device disposed within the s acebetween said cylinders and having its ongitudinalaxis verticallydisposed, means for supplying a cooling liquid to the jacket of saidhorizontal cylinder, means for conducting liquid from the jacket of saidhorizontal cylinder to the bottom of said heatexchange device andconducting the same directly from the top thereof to the bottom of thejacket of said vertically disposed cylinder, and means for conductingfluid from said horizontally disposed cylinder to said verticallydisposed cylinder causing the same to flow from the top to the bottom ofsaid heat exchange device including a lurality of means providing pathsfor said uid through said heat exchange device.

12. In combination, in a compressor, a low pressure cylinder, a jacketedcylinder receiving compressed fluid from said low pressure beingvertical, an intercooler intermediate cylinder and cooperating in thefurther compression thereof, a crank shaft, the axes of said cylindersmaking an angle with each other whose apex lies in said crank shaft, anintercooler intermediate said cylinders,

said cylinders and intercoolerall lying to one side of a plane passingthrough said crank shaft, means for supplying a cooling liquid to thebottom of said inter-cooler and conducting the same directly from thetop thereof to the bottom of the jacket of said second mentionedcylinder, and means for conducting fluid from said first to said secondcylinder causing the same to flow vertically in contact with coolingwalls from the point of entering the intercooler to adjacent the topthereof and to thereupon change direction and move in contact withcooling walls to the bottom of said intercooler including a plurality ofmeans providing paths in the intercooler for said fluid.

13. In combination, in a compressor, a jacketed cylinder disposed withits axis horizontal, a jacketed cylinder disposed with its axis verticaland receiving compressed fluid from said horizontally disposed cylinderand from the to cooperating in the further compression thereof, a crankshaft, the axes of said cylinders making an angle with each other whoseapex lies in said crank shaft, an intercooler disposed within the spacebetween said cyl: inders and having its longest dimension verticallydisposed, means for supplying a cooling liquid to the jacket of saidhorizontally disposed cylinder, means for conducting liquid from thejacket of said horizontally disposed cylinder to the bottom of saidintercooler and conducting the same directly thereof to the bottom ofthe jacket of said vertically dis osed cylinder, and means forconducting uid from said horizontally disposed cylinder to saidvertic'ally disposed cylinder causing the same to flow vertically incontact with cooling walls from the point of entering said intercoolcl'to adjacent the top thereof and to thereupon change direction and movein contact with cooling walls to the bottom of said intercoolerincluding a plurality of means providing paths in the intercooler forsaid fluid.

In testimony whereof I alfix my signature.

FRED D. HOLDSVVORTH.

